Answer:
Providing a security system for communication online.
Explanation:
Social Networks are built to provide a platform for people to connect online.
<span>Filtering of packets as they leave the network destined for the internet is called packet filtering. This firewall technique is also known as static filtering, and it is mainly used to control network access through the process of monitoring both outgoing and incoming packets. Along with monitoring, it functions to allow the packets to pass or halt which takes place based on the source of Internet Protocol.</span>
The answer is c post office protocol version 3 (POP 3)
Answer:
The C++ code is given below with appropriate comments for better understanding
Explanation:
/*C++ program that prompts user to enter the name of input file(input.txt in this example) and print the sum of the values in the file to console. If file dosnot exist, then close the program */
//header files
#include <fstream>
#include<string>
#include <iostream>
#include <cstdlib> //needed for exit function
using namespace std;
//function prototype
int fileSum(string filename);
int main()
{
string filename;
cout << "Enter the name of the input file: ";
cin >> filename;
cout << "Sum: " << fileSum(filename) << endl;
system("pause");
return 0;
}
/*The function fileSum that takes the string filename and
count the sum of the values and returns the sum of the values*/
int fileSum(string filename)
{
//Create a ifstream object
ifstream fin;
//Open a file
fin.open(filename);
//Initialize sum to zero
int sum=0;
//Check if file exist
if(!fin)
{
cout<<"File does not exist ."<<endl;
system("pause");
exit(1);
}
else
{
int value;
//read file until end of file exist
while(fin>>value)
{
sum+=value;
}
}
return sum;
}//end of the fileSum